Surveys of the Brno underground have been underway for more than three decades. During this time, a surprisingly large number of underground structures have been discovered and structurally secured, significantly enriching knowledge about the history of the city. The professional and general public can only learn about the overwhelming majority of the underground structures through documents, photographs, and informational texts. However, as research efforts have progressed over recent years, findings have been so fundamentally and historically interesting that the intentions of experts engaged in this activity have increasingly been considered in terms of more interesting presentations. Some of the discovered spaces have been presented to the public on various special occasions. The interest in seeing them, however, was so great that it could not be sufficiently satisfied by such rare viewings. The tours of newly found underground structures followed at increasingly frequent intervals, and the interest of experts, as well as of Brno residents, grew. The situation and several studies submitted on the use of the discovered spaces gradually convinced the city representatives of their attraction and the feasibility of their presentation. The effort to open the Brno underground to the public culminated in 2008 with the preparation and implementation of the project entitled “Making the Brno Underground Accessible”. Of the historical sites that were offered, three objects were selected as the most interesting: the mint master's cellar on Dominican Square, the labyrinth under Zelný trh (Vegetable Market), and the ossuary at the Church of St James. After thorough preparation and the approval of the Brno City Assembly, the project was launched in 2009 with financial support from the Regional Operational Program of the European Union Funds.
The Mint Master's Cellar and the cellar exposition under the New Town Hall were opened to the public on November 26, 2010. They became the first permanent accessible location of Brno's historical underground. In early 2011, the Labyrinth under Zelný trh was completed and made available. The last of the three underground spaces, the Ossuary Underneath the Church of St James, was completed and opened in 2012.
The history of the Brno underground is rich and its scope continues to expand with continued exploration. Each year, new discoveries and findings extend our knowledge and provide the missing elements about the times in which these buildings were constructed and served their purpose. Evidence of the activities of our ancestors is still available through the underground areas of Brno. The memory of the city presents us with the chance to assess which of the interesting parts of history lying under the Brno pavement we will keep.